Legend label customization in Vue Heatmap chart component

16 Mar 20236 minutes to read

You can change the legend label using the ‘legendRender’ client-side event. You can also hide the legend label using this client-side event.

app.vue

<template>
    <div id="app">
        <ejs-heatmap id="heatmap" :titleSettings='titleSettings' :xAxis='xAxis' :yAxis='yAxis' :dataSource='dataSource' :cellSettings='cellSettings'  :legendRender='legendRender' :paletteSettings='paletteSettings'></ejs-heatmap>
    </div>
</template>
<script>
import Vue from 'vue';
import { HeatMapPlugin, Tooltip, Legend } from '@syncfusion/ej2-vue-heatmap';
Vue.use(HeatMapPlugin);

export default {
  data: function() {
    return {
        dataSource: [
            [73000, 39000, 26000, 39000, 94000, 0],
            [93000, 58000, 53000, 38000, 26000, 68000],
            [99000, 28000, 22000, 4000, 66000, 9000],
            [14000, 26000, 97000, 69000, 69000, 3000],
            [7000, 46000, 47000, 47000, 88000, 6000],
            [41000, 55000, 73000, 23000, 30000, 79000],
            [56000, 69000, 21000, 86000, 3000, 33000],
            [45000, 7000, 53000, 81000, 95000, 79000],
            [60000, 77000, 74000, 68000, 88000, 51000],
            [25000, 25000, 10000, 12000, 78000, 14000],
            [25000, 56000, 55000, 58000, 12000, 82000],
            [74000, 33000, 88000, 23000, 86000, 59000]
        ],
        titleSettings: {
            text: 'Sales Revenue per Employee (in 1000 US$)',
            textStyle: {
                size: '15px',
                fontWeight: '500',
                fontStyle: 'Normal',
                fontFamily: 'Segoe UI'
            }
        },
        xAxis: {
            labels: ['Nancy', 'Andrew', 'Janet', 'Margaret', 'Steven',
            'Michael', 'Robert', 'Laura', 'Anne', 'Paul', 'Karin',   'Mario']
        },
        yAxis: {
            labels: ['Mon', 'Tues', 'Wed', 'Thurs', 'Fri', 'Sat']
        },
        cellSettings: {
            showLabel: false,
        },
        paletteSettings: {
            palette: [
            { value: 0, color: '#C2E7EC' },
            { value: 25000, color: '#AEDFE6' },
            { value: 50000, color: '#9AD7E0' },
            { value: 75000, color: '#72C7D4' },
            { value: 99000, color: '#5EBFCE' },
        ],
            type: "Gradient"
        },


    }
  },
  
 provide:{
    heatmap:[Tooltip, Legend]
},

methods :{

    legendRender: function(args)
    {
        if(args.text=='25,000' || args.text=='50,000'|| args.text=='99,000'){
            args.text = args.text.replace(/,/, "");
            args.text = `${parseInt(args.text/1000)}` + "k "+"$";
        } else {
            args.cancel=true;
        }
    }
}
}
</script>

<style>
@import '../node_modules/@syncfusion/ej2-vue-heatmap/styles/material.css';
</style>